Question 1

A 0.8838-g sample of an ionic compound containing bromide ions and an unknown metal cation is dissolved in water and treated with an excess of AgNO3. If 1.573 g of a AgBr precipitate forms, what is the percent by mass of Br in the original compound?

Accepted Answer

A)   62.13%
B)   75.72%
C)   56.19%
D)   42.55%
E)   37.87%F) A) and B)
G) A) and E)

Question 2

Which accurately characterizes all nonelectrolyte solutions?

Accepted Answer

A)   Nonelectrolyte solutions contain molecules.
B)   Nonelectrolyte solutions conduct electricity.
C)   Nonelectrolyte solutions react with other solutions.
D)   Nonelectrolyte solutions do not conduct electricity.
E)   Nonelectrolyte solutions conduct heat.F) A) and E)
G) B) and C)

Question 3

A 50.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?

Accepted Answer

A)   2.18 M
B)   0.523 M
C)   0.349 M
D)   0.174 M
E)   0.0872 MF) A) and E)
G) All of the above

Question 4

Which of these compounds is a nonelectrolyte?

Accepted Answer

A)   NaF
B)   HNO3
C)   CH3COOH (acetic acid) 
D)   NaOH
E)   C6H12O6 (glucose) F) C) and E)
G) A) and C)

Question 5

Which is a strong base?

Accepted Answer

A)   LiOH
B)   CH3COOH
C)   NH3
D)   H3PO4
E)   HClO2F) None of the above
G) C) and D)

Question 6

Identify the major ions present in an aqueous LiOH solution.

Accepted Answer

A)   Li2+, O-, H-
B)   Li+, OH-
C)   LiO-, H+
D)   Li+, O2-, H+
E)   Li-, OH+F) C) and E)
G) A) and E)

Question 7

The diagram below represents the final mixture corresponding to which chemical process? (Each sphere represents 1 mole of ions.)

Accepted Answer

A)   Six moles of sodium metal are added to six moles of hydrochloric acid.
B)   Six moles of magnesium metal are added to six moles of hydrochloric acid.
C)   Six moles of aluminum metal are added to twelve moles of hydrochloric acid.
D)   Twelve moles of sodium metal are added to twelve moles of hydrochloric acid.
E)   Twelve moles of magnesium metal are added to twelve moles of hydrochloric acid.F) C) and D)
G) D) and E)

Question 8

Calcium nitrate tetrahydrate dissolves in warm water to the extent of 266 g per 100. cm3. What is the concentration of nitrate ions in this solution?

Accepted Answer

A)   32.4 M
B)   22.5 M
C)   11.3 M
D)   16.2 M
E)   8.10 MF) All of the above
G) A) and E)

Question 9

What volume of a 0.442 M NaOH solution is needed to neutralize 65.0 mL of a 0.296 M solution of HNO3?

Accepted Answer

A)   8.71 mL
B)   21.8 mL
C)   43.5 mL
D)   87.1 mL
E)   174 mLF) All of the above
G) C) and D)

Question 10

Which is a weak base?

Accepted Answer

A)   NH3
B)   Ca(OH) 2
C)   Ba(OH) 2
D)   NaOH
E)   CH3COOHF) C) and E)
G) B) and D)

Question 11

If aqueous solutions of ammonium sulfide and copper(II)  nitrate are mixed, which insoluble precipitate is formed?

Accepted Answer

A)   CuS
B)   Cu2S
C)   NH4NO3
D)   NH4(NO3) 2
E)   CuSO4F) A) and D)
G) A) and C)

Question 12

If aqueous solutions of Mg(C2H3O2) 2 and LiOH are mixed, which insoluble precipitate is formed?

Accepted Answer

A)   LiC2H3O2
B)   Li(C2H3O2) 2
C)   MgOH
D)   Mg(OH) 2
E)   CH3OHF) B) and E)
G) None of the above

Question 13

Sodium hydroxide is water soluble.

Accepted Answer

A) True 
 B)False

Question 14

A(n) ________ ________ is the name given for the substance that causes another substance to undergo oxidation.

Accepted Answer

The answer of A(n) ________ ________ is the name given...

Question 15

A 350-mL sample of 0.276 M HNO3 is partially neutralized by 125 mL of 0.120 M Ca(OH) 2. Find the concentration of nitric acid in the resulting solution.

Accepted Answer

A)   0.0429 M
B)   0.140 M
C)   0.172 M
D)   0.203 M
E)   0.773 MF) A) and E)
G) A) and D)

Question 16

Based on the solubility rules, which of these processes will occur when solutions of ZnSO4(aq)  and MgCl2(aq)  are mixed?

Accepted Answer

A)   ZnCl2 will precipitate; Mg2+ and SO42- are spectator ions.
B)   ZnSO4 will precipitate; Mg2+ and Cl- are spectator ions.
C)   MgSO4 will precipitate; Zn2+ and Cl- are spectator ions.
D)   MgCl2 will precipitate; Zn2+ and SO42- are spectator ions.
E)   No precipitate will form.F) B) and C)
G) B) and E)

Question 17

What is the reducing agent in the following reaction? Mg + NiO2 + 2H2O → Mg(OH) 2 + Ni(OH) 2

Accepted Answer

A)   Mg
B)   NiO2
C)   H2O
D)   Mg(OH) 2
E)   Ni(OH) 2F) B) and C)
G) A) and C)

Question 18

If aqueous solutions of Na2CO3 and BaCl2 are mixed, which insoluble precipitate is formed?

Accepted Answer

A)   Ba2CO3
B)   BaCO3
C)   NaCl
D)   NaCl2
E)   BaOF) All of the above
G) A) and B)

Question 19

Which of these compounds is a strong electrolyte?

Accepted Answer

A)   H2O
B)   N2
C)   CH3COOH (acetic acid) 
D)   C2H6O (ethanol) 
E)   KOHF) All of the above
G) B) and D)

Question 20

Which salt is produced by the neutralization of sodium hydroxide with sulfuric acid?

Accepted Answer

A)   Na2SO4
B)   Na2(SO4) 3
C)   Na(SO4) 2
D)   Na2SO3
E)   Na2SF) A) and E)
G) A) and D)

Exam 4: Reactions in Aqueous Solutions

Identify the major ions present in an aqueous LiOH solution.

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Which is a weak base?

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A 350-mL sample of 0.276 M HNO3 is partially neutralized by 125 mL of 0.120 M Ca(OH) 2. Find the concentration of nitric acid in the resulting solution.

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If aqueous solutions of Mg(C2H3O2) 2 and LiOH are mixed, which insoluble precipitate is formed?

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A 0.8838-g sample of an ionic compound containing bromide ions and an unknown metal cation is dissolved in water and treated with an excess of AgNO3. If 1.573 g of a AgBr precipitate forms, what is the percent by mass of Br in the original compound?

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Calcium nitrate tetrahydrate dissolves in warm water to the extent of 266 g per 100. cm3. What is the concentration of nitrate ions in this solution?

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What volume of a 0.442 M NaOH solution is needed to neutralize 65.0 mL of a 0.296 M solution of HNO3?

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Which of these compounds is a strong electrolyte?

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Sodium hydroxide is water soluble.

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A(n) ________ ________ is the name given for the substance that causes another substance to undergo oxidation.

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If aqueous solutions of Na2CO3 and BaCl2 are mixed, which insoluble precipitate is formed?

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What is the reducing agent in the following reaction? Mg + NiO2 + 2H2O → Mg(OH) 2 + Ni(OH) 2

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Which salt is produced by the neutralization of sodium hydroxide with sulfuric acid?

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Based on the solubility rules, which of these processes will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed?

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Which of these compounds is a nonelectrolyte?

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A 50.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?

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Which is a strong base?

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Which accurately characterizes all nonelectrolyte solutions?

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If aqueous solutions of ammonium sulfide and copper(II) nitrate are mixed, which insoluble precipitate is formed?

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The diagram below represents the final mixture corresponding to which chemical process? (Each sphere represents 1 mole of ions.)

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A 350-mL sample of 0.276 M HNO₃ is partially neutralized by 125 mL of 0.120 M Ca(OH) ₂. Find the concentration of nitric acid in the resulting solution.

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If aqueous solutions of Mg(C₂H₃O₂) ₂ and LiOH are mixed, which insoluble precipitate is formed?

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A 0.8838-g sample of an ionic compound containing bromide ions and an unknown metal cation is dissolved in water and treated with an excess of AgNO₃. If 1.573 g of a AgBr precipitate forms, what is the percent by mass of Br in the original compound?

Correct Answer
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Calcium nitrate tetrahydrate dissolves in warm water to the extent of 266 g per 100. cm³. What is the concentration of nitrate ions in this solution?

Correct Answer
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What volume of a 0.442 M NaOH solution is needed to neutralize 65.0 mL of a 0.296 M solution of HNO₃?

Correct Answer
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A(n) is the name given for the substance that causes another substance to undergo oxidation.

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If aqueous solutions of Na₂CO₃ and BaCl₂ are mixed, which insoluble precipitate is formed?

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What is the reducing agent in the following reaction? Mg + NiO₂ + 2H₂O → Mg(OH) ₂ + Ni(OH) ₂

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Based on the solubility rules, which of these processes will occur when solutions of ZnSO₄(aq) and MgCl₂(aq) are mixed?

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A 50.0 mL sample of 0.436 M NH₄NO₃ is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?

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